Two years ago, St. Louis’s stature in the chess world grew even bigger when the World Chess Hall of Fame and Museum moved there from Florida. It is housed in a building across the street from the chess center, with the world’s tallest chess piece displayed outside.

St. Louis will play host in September to Magnus Carlsen of Norway, the world’s No. 1 player, in his first tournament appearance in the United States. He will play in a four-man tournament named after Sinquefield — the Sinquefield Cup — whose other competitors will be the world’s second-ranked player, Levon Aronian of Armenia, and the top two Americans, Hikaru Nakamura, No. 8, and Gata Kamsky, No. 11. The prize fund is $170,000.

It would have been a blunder for Naroditsky to play 8 c3, because after 8 ... Nc3 9 bc3 Bc3 10 Bd2 Bd4, Shetty would have been up two pawns. Shetty’s 12 ... Qc7 allowed Naroditsky to isolate his d pawn. It might have been better to play 12 ... Bf6, followed by 13 ... Nce7.

Shetty blundered with 24 ... Bf6, though his position was difficult. If Shetty had played 25 ... gf6, his pawns would have been crippled, and Naroditsky could have played 26 Re7, giving him a clear edge.

Shetty’s 28 ... Qa2 was clever, making use of the threat of a back-rank mate. Naroditsky could not play 29 Ra2 without allowing 29 ... Rd1, mate.

Naroditsky used the same back-rank mate threat by playing 31 Ra7. Shetty could not take the rook without allowing 32 Re8.

A version of this article appears in print on July 7, 2013, on Page A13 of the New York edition with the headline: Refrain for Many Players: Meet Me in St. Louis. Order Reprints|Today's Paper|Subscribe